A dark-brown-to-black cement-like material containing bitumens as the predominant constituent
obtained by petroleum processing; used primarily for road construction. It includes crude
asphalt as well as the following finished products: cements, fluxes, the asphalt content of
emulsions (exclusive of water), and petroleum distillates blended with asphalt to make
cutback asphalts. Note: The conversion factor for asphalt is 5.5 barrels per short ton.

Barrel

A unit of volume equal to 42 U.S. gallons.

Blending Plant

A facility which has no refining capability but is either capable of producing finished
motor gasoline through mechanical blending or blends oxygenates with motor gasoline.

A mixture of hydrocarbons that exists in liquid phase in natural underground
reservoirs and remains liquid at atmospheric pressure after passing through
surface separating facilities. Depending upon the characteristics of the crude
stream, it may also include:

Small amounts of hydrocarbons that exist in gaseous phase in natural
underground reservoirs but are liquid at atmospheric pressure after being
recovered from oil well (casinghead) gas in lease separators and are subsequently
commingled with the crude stream without being separately measured. Lease
condensate recovered as a liquid from natural gas wells in lease or field
separation facilities and later mixed into the crude stream is also included;

Small amounts of nonhydrocarbons produced with the oil, such as sulfur and
various metals;

Liquids produced at natural gas processing plants are excluded. Crude oil is refined to produce
a wide array of petroleum products, including heating oils; gasoline, diesel and jet fuels;
lubricants; asphalt; ethane, propane, and butane; and many other products used for their
energy or chemical content.

Crude Oil Production

The volume of crude oil produced from oil reservoirs during given periods of time. The amount
of such production for a given period is measured as volumes delivered from lease storage
tanks (i.e., the point of custody transfer) to pipelines, trucks, or other media for transport
to refineries or terminals with adjustments for (1) net differences between opening and
closing lease inventories, and (2) basic sediment and water (BS&W).

Days of Supply

A measure of the adequacy of inventories. It is calculated by taking the current
stock level and dividing by product supplied (used as an estimate of demand)
averaged over the most recent four-week period. For crude oil, refinery inputs of
crude oil are used as a proxy for demand.

Distillate Fuel Oil

A general classification for one of the petroleum fractions produced in conventional
distillation operations. It includes diesel fuels and fuel oils. Products known as No. 1,
No. 2, and No. 4 diesel fuel are used in on-highway diesel engines, such as those in trucks
and automobiles, as well as off-highway engines, such as those in railroad locomotives and
agricultural machinery. Products known as No. 1, No. 2, and No. 4 fuel oils are used primarily
for space heating and electric power generation.

Exports

Shipments of crude oil and petroleum products from the 50 States and the District of Columbia
to foreign countries, Puerto Rico, the Virgin Islands, and other U.S. possessions and territories.

Finished Motor Gasoline

A complex mixture of relatively volatile hydrocarbons with or without small quantities of
additives, blended to form a fuel suitable for use in spark-ignition engines. Motor gasoline,
as defined in ASTM Specification D 4814 or Federal Specification VV-G-1690C, is characterized
as having a boiling range of 122 to 158 degrees Fahrenheit at the 10 percent recovery point to
365 to 374 degrees Fahrenheit at the 90 percent recovery point. Motor Gasoline includes
conventional gasoline; all types of oxygenated gasoline, including gasohol; and
reformulated gasoline, but excludes aviation gasoline. Note: Volumetric data on blending
components, such as oxygenates, are not counted in data on finished motor gasoline until
the blending components are blended into the gasoline.

Finished Motor Gasoline Adjustment

Adjustment to correct for the imbalance created by the blending of fuel ethanol and motor gasoline blending components.

Fuel Ethanol

An anhydrous alcohol (ethanol with less than 1% water) intended for gasoline blending as described in the
Oxygenates definition.

Gasoline Treated as Blendstock (GTAB)

Non-certified Foreign Refinery gasoline classified by an importer as blendstock to be either blended or reclassified with respect to
reformulated or conventional gasoline. GTAB was classified on EIA surveys as either reformulated or conventional based on emissions performance and the intended end use in data through the end of December 2009. Designation of GTAB as reformulated or conventional was discontinued beginning with data for January 2010. GTAB was reported as a single product beginning with data for January 2010. GTAB data for January 2010 and later months is presented as conventional motor gasoline blending components when reported as a subset of motor gasoline blending components.

Receipts of crude oil and petroleum products into the 50 States and the District of Columbia
from foreign countries, Puerto Rico, the Virgin Islands, and other U.S. possessions and territories.

Kerosene

A light petroleum distillate that is used in space heaters, cook stoves, and water heaters
and is suitable for use as a light source when burned in wick-fed lamps. Kerosene has a
maximum distillation temperature of 400 degrees Fahrenheit at the 10-percent recovery point,
a final boiling point of 572 degrees Fahrenheit, and a minimum flash point of 100 degrees
Fahrenheit. Included are No. 1-K and No. 2-K, the two grades recognized by ASTM Specification
D 3699 as well as all other grades of kerosene called range or stove oil, which have properties
similar to those of No. 1 fuel oil. See Kerosene-Type Jet Fuel.

Kerosene-Type Jet Fuel

A kerosene-based product having a maximum distillation temperature of 400 degrees Fahrenheit
at the 10-percent recovery point and a final maximum boiling point of 572 degrees Fahrenheit
and meeting ASTM Specification D 1655 and Military Specifications MIL-T-5624P and MIL-T-83133D
(Grades JP-5 and JP-8). It is used for commercial and military turbojet and turboprop aircraft
engines.

Commercial

- Kerosene-type jet fuel intended for use in commercial aircraft.

Military

- Kerosene-type jet fuel intended for use in military aircraft.

Liquefied Refinery Gases (LRGs)

Liquefied petroleum gases fractionated from refinery or still gases. Through compression
and/or refrigeration, they are retained in the liquid state. The reported categories are
ethane/ethylene, propane/propylene, normal butane/butylene, and isobutane/isobutylene.
Excludes still gas.

Low-Sulfur Distillate Fuel Oil

Distillate fuel oil having sulfur
content greater than 15 ppm to 500 ppm. Low sulfur distillate fuel
oil also includes product with sulfur content equal to or less than
15 ppm if the product is intended for pipeline shipment and the
pipeline has a sulfur specification below 15 ppm.

Naphthas (e.g., straight-run gasoline, alkylate, reformate, benzene, toluene, xylene) used for
blending or compounding into finished motor gasoline. These components include reformulated
gasoline blendstock for oxygenate blending (RBOB) but exclude oxygenates (alcohols, ethers),
butane, and pentanes plus. Note: Oxygenates are reported as individual components and are
included in the total for other hydrocarbons, hydrogens, and oxygenates.

Naphtha-Type Jet Fuel

A fuel in the heavy naphtha boiling range having an average gravity of 52.8 degrees API,
20 to 90 percent distillation temperatures of 290 degrees to 470 degrees Fahrenheit, and
meeting Military Specification MIL-T-5624L (Grade JP-4). It is used primarily for military
turbojet and turboprop aircraft engines because it has a lower freeze point than other
aviation fuels and meets engine requirements at high altitudes and speeds. Note: Beginning
with January 2004 data, naphtha-type jet fuel is included in "Other Oils".

Natural Gas Plant Liquids (NGPLs)

Those hydrocarbons in natural gas that are separated as liquids at natural gas processing
plants, fractionating and cycling plants, and, in some instances, field facilities.
Lease condensate is excluded. Products obtained include ethane; liquefied petroleum
gases (propane, butanes, propane-butane mixtures, ethane-propane mixtures); isopentane;
and other small quantities of finished products, such as motor gasoline, special naphthas,
jet fuel, kerosene, and distillate fuel oil.

Net Imports

Imports minus exports.

OPRG

"Oxygenated Fuels Program Reformulated Gasoline" is reformulated gasoline which is intended
for use in an oxygenated fuels program control area.

Operable Capacity

The amount of capacity that, at the beginning of the period, is in operation; not in operation
and not under active repair, but capable of being placed in operation within 30 days; or not
in operation but under active repair that can be completed within 90 days. Operable capacity
is the sum of the operating and idle capacity and is measured in barrels per calendar day or
barrels per stream day.

Other Oils

Includes aviation gasoline, kerosene, natural gas plant liquids and LRGs (except propane/propylene), unfinished oils, other hydrocarbons and oxygenates (except fuel ethanol), aviation gasoline blending components, naphtha and other oils for petrochemical feedstock use, special naphthas, lube oils, waxes, coke, asphalt, road oil, and miscellaneous oils. Includes naphtha-type jet fuel beginning in 2004. Propane/propylene was included with other oils prior to 2004. Ethanol was included with other oils prior to June 4, 2010. Other oils stocks includes unfinished oils beginning on June 4, 2010.

Oxygenated Gasoline (Including Gasohol)

Oxygenated gasoline includes all finished motor gasoline, other than reformulated gasoline,
having oxygen content of 2.0 percent or higher by weight. Gasohol containing a minimum
5.7 percent ethanol by volume is included in oxygenated gasoline. Oxygenated gasoline was
reported as a separate product from January 1993 until December 2003 inclusive. Beginning
with monthly data for January 2004, oxygenated gasoline is included in conventional gasoline.
Historical data for oxygenated gasoline excluded Federal Oxygenated Program Reformulated Gasoline
(OPRG). Historical oxygenated gasoline data also excluded other reformulated gasoline with a
seasonal oxygen requirement regardless of season.

Fuel Ethanol: Blends of up to 10 percent by volume anhydrous ethanol (200 proof) (commonly referred to as the
"gasohol waiver").

Methanol: Blends of methanol and gasoline-grade tertiary butyl alcohol (GTBA) such that the total oxygen content
does not exceed 3.5 percent by weight and the ratio of methanol to GTBA is less than or equal to 1. It is also
specified that this blended fuel must meet ASTM volatility specifications (commonly referred to as the "ARCO"
waiver).
Blends of up to 5.0 percent by volume methanol with a minimum of 2.5 percent by volume cosolvent alcohols having a carbon number of 4 or less (i.e., ethanol, propanol, butanol, and/or GTBA). The total oxygen must not exceed 3.7 percent by weight, and the blend must meet ASTM volatility specifications as well as phase separation and alcohol purity specifications (commonly referred to as the "DuPont" waiver).

MTBE (Methyl tertiary butyl ether): Blends up to 15.0 percent by volume MTBE which must meet the ASTM D4814
specifications. Blenders must take precautions that the blends are not used as base gasolines for other
oxygenated blends (commonly referred to as the "Sun" waiver).

Petroleum Administration for Defense (PAD) Districts

Geographic aggregations of the 50 States and the District of Columbia into five districts
by the Petroleum Administration for Defense in 1950. These districts were originally defined
during World War II for purposes of administering oil allocation.
Description and maps of PAD Districts and Refining Districts.

Percent Utilization

Represents the utilization of all crude oil distillation units. The rate is calculated by
dividing gross inputs to these units by the operating/operable refining capacity of the unit.

Approximately represents consumption of petroleum products because it measures the
disappearance of these products from primary sources, i.e., refineries, natural gas
processing plants, blending plants, pipelines, and bulk terminals. In general, product
supplied of each product in any given period is computed as follows: field production, plus
refinery production, plus imports, plus unaccounted for crude oil, (plus net receipts when
calculated on a PAD District basis), minus stock change, minus crude oil losses, minus refinery
inputs, minus exports.

Production

Petroleum products produced at a refinery, natural gas processing plant, or blending plant.
Published production equals production minus input. Negative production will occur when the
amount of a product produced during the reporting period is less than the amount of that same
product that is reprocessed (input) or reclassified to become another product during the same
reporting period.

Propane (C3H8)

A normally gaseous straight-chain hydrocarbon. It is a colorless paraffinic gas that boils
at a temperature of - 43.67 degrees Fahrenheit. It is extracted from natural gas or refinery
gas streams. It includes all products designated in ASTM Specification D1835 and Gas Processors
Association Specifications for commercial propane and HD-5 propane.

Propylene (C3H6)

An olefinic hydrocarbon recovered from refinery processes or petrochemical processes.

Propylene (C3H6) (nonfuel use)

Propylene intended for use in nonfuel applications such as petrochemical manufacturing.
Nonfuel propylene includes chemical-grade propylene, polymer-grade propylene, and trace
amounts of propane. Nonfuel propylene also includes the propylene component of
propane/propylene mixes where the propylene will be separated from the mix in a propane/propylene
splitting process. Nonfuel propylene excludes the propylene component of propane/propylene mixes where
the propylene component of the mix is intended for use as fuel.

RBOB for Blending with Alcohol

Motor gasoline blending components intended to be blended with an alcohol component
(e.g. fuel ethanol) at a terminal or refinery to raise the oxygen content.

RBOB for Blending with Ether

Motor gasoline blending components intended to be blended with an ether component
(e.g. methyl tertiary butyl ether) at a terminal or refinery to raise the oxygen content.

Finished gasoline formulated for use in motor vehicles, the
composition and properties of which meet the requirements of the reformulated gasoline
regulations promulgated by the U.S. Environmental Protection Agency under Section 211(k)
of the Clean Air Act. It includes gasoline produced to meet or exceed emissions performance
and benzene content standards of federal-program reformulated gasoline even though the gasoline
may not meet all of the composition requirements (e.g. oxygen content) of federal-program
reformulated gasoline. Reformulated gasoline excludes Reformulated Blendstock for Oxygenate
Blending (RBOB) and Gasoline Treated as Blendstock (GTAB). Historical reformulated gasoline
statistics included Oxygenated Fuels Program Reformulated Gasoline (OPRG).

Residual Fuel Oil

A general classification for the heavier oils, known as No. 5 and No. 6 fuel oils, that remain
after the distillate fuel oils and lighter hydrocarbons are distilled away in refinery operations.
It conforms to ASTM Specifications D396 and D975 and Federal Specification VV-F-815C.
No. 5, a residual fuel oil of medium viscosity, is also known as Navy Special and is defined in
Military Specification MIL-F-859E, including Amendment 2 (NATO Symbol F-770). It is used in
steam-powered vessels in government service and inshore powerplants. No. 6 fuel oil includes
Bunker C fuel oil and is used for the production of electric power, space heating, vessel
bunkering, and various industrial purposes.

Road Oil

Any heavy petroleum oil, including residual asphaltic oil used as a dust pallative and surface
treatment on roads and highways. It is generally produced in six grades from 0, the most liquid,
to 5, the most viscous.

Stocks

Inventories of fuel stored for future use. Stocks are reported as of the last day of the period
(e.g., week or month).

Strategic Petroleum Reserve (SPR)

Petroleum stocks maintained by the Federal Government for use during periods of major supply
interruption.

Sulfur

A yellowish nonmetallic element, sometimes known as "brimstone." It is present at various
levels of concentration in many fossil fuels.

Distillate fuel oil having
sulfur content of 15 ppm or lower. Ultra-low sulfur distillate fuel
oil that will be shipped by pipeline must satisfy the sulfur
specification of the shipping pipeline if the pipeline specification
is below 15 ppm. Distillate fuel oil intended for pipeline shipment
that fails to meet a pipeline sulfur specification that is below 15
ppm will be classified as low-sulfur distillate fuel oil.

Unfinished Oils

All oils requiring further processing, except those requiring only mechanical blending.
Unfinished oils are produced by partial refining of crude oil and include naphthas and
lighter oils, kerosene and light gas oils, heavy gas oils, and residuum.

Finished motor gasoline production and product supplied includes a weekly adjustment applied only to the U.S. total to correct for the imbalance created by blending of fuel ethanol and motor gasoline blending components. From 1993 to June 4, 2010, this adjustment was estimated from the latest monthly data and allocated to formulation and PAD District
production data.

Reformulated and conventional gasoline production excludes adjustments for fuel ethanol and motor gasoline blending components. Historical data prior to June 4, 2010 includes the adjustment allocated by PAD District formulation.

Commercial and military kerosene jet fuel production is only collected from refiners and may not total to total kerosene jet fuel production.

Propane/propylene includes production from natural gas plants.

Stocks include those domestic and Customs-cleared foreign stocks held at, or in transit to,
refineries and bulk terminals, and stocks in pipelines. Stocks held at natural gas processing
plants are included in "Other Oils" and in totals. All stock levels are as of the end of the
period.

Crude oil stocks include those domestic and Customs-cleared foreign crude oil stocks held at
refineries, in pipelines, in lease tanks, and in transit to refineries.

Crude oil stocks for Cushing include domestic and foreign crude oil stocks held in tank farms in Lincoln, Payne, and Creek counties in Oklahoma. Cushing, Oklahoma, is the designated delivery point for NYMEX crude oil futures contracts.

Alaska in-transit crude oil stocks include crude oil stocks in-transit by water between Alaska and the other States, the District of Columbia, Puerto Rico, and the Virgin Islands, as well as stocks held at transshipment terminals.